Well it's my first critique ! XD
I love the work overall here's the breakdown of what bothers me and what I find cool.

Pros:
- Loving the drawing, face is nice, body is done well although I think you could have made her hips a tiny bit bigger.
-The shaded clothes vs unshaded skin is cool!
-Nice use of positive and negative space, especially important in such a high contrast black and white work.

Cons:
-Smudge is EVIL. I don't know if you used it, but it looks like it and it's BAD! XD Her clothes are too smudgy it reduces the impact the picture could have. In fact I think that plain black would have worked better. But if you want to keep the airbrushed feel (as I said the unshaded vs shaded does look cool) I would advice to add some sharp shadows mixed in it. The airbrush/hard shadows combo will give a much better and polished looking picture, you can also put the hard shadows on a separate layer lock it and then airbrush them it gives a nice effect : ) And even while working only with airbrushes it's important to play with airbrush sizes mixing very big zones with almost sharp looking shadows.
- Her hands could have used more work, they lack some definition and look more like forms then hands.
- The folding on the dress is unclear especially as to why there are no folding on our left side. If it's because she's lifting a lower part of her dress it should be made clearer.

And that's it, the cons part is bigger only because it takes longer to explain what I find wrong then to explain what works ^^' Overall as I already said I love the picture, in fact, I don't critique pictures I don't like ^^